Can GPU be used in the space of Trusted and Non-trusted on the i.MX6Quad ?

[masahikotomita]

Hi, all

I've questions about the GPU on the i.MX6Quad.

i.MX6Quad has TrustZone feature (ARM security extensions).

I think that the system by which Trusted and Non-trusted space exist using it will be made.
So, I'd like to know whether GPU can be used in the space of Trusted and Non-trusted.
Is it possible?

As long as I read some reference documents (Security Reference,, and so on),
I guess what is necessary is just to change setup of the register values of CSU(Central Security Unit).

But I think below:
  a) AHB Slave bus (for command bus) connected to GPU can be used in the both spaces.
  b) AXI Master bus (for memory access and so on) connected to GPU can't be used in the both spaces.
     But if CSU's registers are set non-secure, I maybe think it can be used in the both spaces.

Please correct me if it's wrong.
I would appreciate your reply.

[YixingKong]

Masahike

This discussion is closed since no activity. If you still need help, please feel free to reply with an update to this discussion, or create another discussion.

Thanks,

Yixing

[masahikotomita]

Hi, Yixing

Thank you for reply.

I'm so sorry. I couldn't reply ASAP because I didn't access to this HP.

This discussion is closed now.

Thanks,

Masahiko

[YixingKong]

Masahike

We have not got your response yet and will close the discussion in 3 days. If you still need help, please feel free to reply with an update to this discussion.

Thanks,

Yixing

[YixingKong]

Masahike

We are sorry for getting back to you so late. Are you still stuck with the issue? If you have somehow to resolved the issue, can we close the discussion? If you still need help, please feel free to reply with an update to this discussion.

Thanks,
Yixing